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NPT螺纹，PT螺纹，G螺纹和公制螺纹的含义和区别 |
小黑屋|手机版|Archiver|机械社区 ( 京ICP备10217105号-1，京ICP证050210号，浙公网安备33038202004372号 )
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发表于 2011-7-13 11:19:44
